參數(shù)資料
型號(hào)： LC5768VG-75F484I
廠商： Lattice Semiconductor Corporation
文件頁(yè)數(shù)： 11/99頁(yè)
文件大?。?/td> 0K
描述： IC XPLD 768MC 7.5NS 484FPBGA
標(biāo)準(zhǔn)包裝： 60
系列： ispMACH™ 5000VG
可編程類型： 系統(tǒng)內(nèi)可編程
最大延遲時(shí)間 tpd(1)： 7.5ns
電壓電源 - 內(nèi)部： 3 V ~ 3.6 V
邏輯元件/邏輯塊數(shù)目： 24
宏單元數(shù)： 768
輸入/輸出數(shù)： 304
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 484-BBGA
供應(yīng)商設(shè)備封裝： 484-FPBGA（23x23）
包裝： 托盤
Lattice Semiconductor
ispXPLD 5000MX Family Data Sheet
15
Clock Distribution
The ispXPLD 5000MX family has four dedicated clock input pins: GCLK0-GCLK3. GLCK0 and GCLK3 can be
routed through a PLL circuit or routed directly to the internal clock nets. The internal clock nets (CLK0-CLK3) are
directly related to the dedicated clock pins (see Secondary Clock Divider exception when using the sysCLOCK cir-
cuit). These feed the registers in the MFBs. Note at each register there is the option of inverting the clock if
required. Figure 14 shows the clock distribution network.
Figure 14. Clock Distribution Network
sysCLOCK PLL
The sysCLOCK PLL circuitry consists of Phase-Lock Loops (PLLs) and the various dividers, reset and feedback
signals associated with the PLLs. This feature gives the user the ability to synthesize clock frequencies and gener-
ate multiple clock signals for routing within the device. Furthermore, it can generate clock signals that are de-
skewed either at the board level or the device level.
The ispXPLD 5000MX devices provide two PLL circuits. PLL0 receives its clock inputs from GCLK 0 and provides
outputs to CLK 0 (CLK 1 when using the secondary clock). PLL1 operates with signals from GCLK 3 and CLK 3
(CLK 2 when using the secondary clock). The optional outputs CLK_OUT can be routed to an I/O pin. The optional
PLL_LOCK output is routed into the GRP. The optional input PLL_RST can be routed either from the GRP or
directly from an I/O pin. The optional PLL_FBK into can be routed directly from a pin. Figure 15 shows the ispXPLD
5000MX PLL block diagram. Figure 16 shows the connection of optional inputs and outputs.
sysCLOCK PLLs
Global Clock Routing
Clock Net
PLL0
CLK_OUT0
SEC_OUT0
VREF0
CLK0
CLK1
GCLK0
GCLK1
I/O/CLK_OUT0
Clock Net
PLL1
CLK_OUT1
SEC_OUT1
CLK3
CLK2
GCLK3
GCLK2
I/O/CLK_OUT1
Clock Net
To Macrocells
VREF1
VREF3
VREF2
SELECT
DEVICES
DISCONTINUED
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